Board Thread:DMC5 Spoilers/@comment-26516813-20190501093045/@comment-6769189-20190501094831

Vergil atoned for his actions in DMC5 by closing the gate. He wasnt responsible for his actions as Nelo Angelo. He may feel some guilt over what happened in 3 but it really doesnt seem like it.

The ghosts wouldnt make sense. He doesnt have beef with any of the characters you mentioned.

V becoming his conscience would serve to undermine Vergil's arc in 5, where Vergil comes to accept himself for all of what he is.

Vergil's Downfall's story (as a concept) worked because Vergil had unresolved issues with the "people" he faced.